package xiaohongshu;

import java.util.Scanner;

public class Main1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        in.nextLine();
        String s = in.nextLine();
        int len = s.length();
        for(int i = 0;i<len;i++){
            System.out.print(x(s.charAt(i)));
        }
    }
    public static char x(char c){
        if(c == 'a') return 'x';
        else if(c == 'b') return 'y';
        else if(c == 'c') return 'z';

        else return (char)(c-3);

    }
}
